Attempting to Link Vista PC with Macbook pro

Ok so I have a vista desktop and a macbook pro. I am trying to set up a network so that I can share files between the two computers but nothing I do works or if I am able to create a network then I lose internet. I need to know how to be able to get files off both computers without paying for some service and still have internet running! I run my own business and it's very important that I am able to do this soon. Also, while I am computer literate, I am not the geek squad (obviously hence this post) so I would appreciate any response to be in lamens terms and easy to do Please help me lol!


Jocelyn